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Re: [libvirt] [PATCH] qemu: Fix shutdown regression



On 09/20/2011 11:39 AM, Jiri Denemark wrote:
The commit that prevents disk corruption on domain shutdown
(96fc4784177ecb70357518fa863442455e45ad0e) causes regression with QEMU
0.14.* and 0.15.* because of a regression bug in QEMU that was fixed
only recently in QEMU git. With affected QEMU binaries, domains cannot
be shutdown properly and stay in a paused state. This patch tries to
avoid this by sending SIGKILL to 0.1[45].* QEMU processes. Though we
wait a bit more between sending SIGTERM and SIGKILL to reduce the
possibility of virtual disk corruption.
---
  src/qemu/qemu_capabilities.c |    7 +++++++
  src/qemu/qemu_capabilities.h |    1 +
  src/qemu/qemu_process.c      |   19 +++++++++++++------
  3 files changed, 21 insertions(+), 6 deletions(-)

ACK. But it would be nice if upstream qemu could give us a more reliable indication of whether the qemu SIGTERM bug is fixed, so that we don't corrupt data on a patched 0.14 or 0.15 qemu. That is, as part of fixing the bug in qemu, we should also update -help text or something similar, so that libvirt can avoid making decisions solely on version numbers.

--
Eric Blake   eblake redhat com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org


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